Question about Rheem RTG-53PVN Indoor Natural Gas Tankless Water Heater for 1-2 Bathroom H

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Hot and cold water from tankless heater

I installed a Richmond brand tankless water heater and the water runs hot for approx 15mins. and then goes cold. It takes 3-4 mins. for the water to warm up again. The heater is natural gas and we never had a problem with our old tank heater. Could there be something I did wrong on the installation? I followed the directions to the letter and have tried to pinpoint the problem with troubleshooting guide but with no luck.
Thanks for any help
shivering in the shower

Posted by on

  • help_me1997 Apr 04, 2009

    Ours will just turn off completely in the middle of showers and we have to turn it back on. It never turns off while filling the bathtub though. Please help! We've been over the installation instructions and are confident all is correct.

  • Anonymous May 01, 2009

    I installed a Richmond brand tankless water heater and the water runs lukewarm I followed all the instruction and have it set at 140 but by the time it gets to the show its 100. Did not have a problem with my old tanked water heater. Thinking of pulling it all out and going back to the tank. Richmond 74, one bath home



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Check your tigh/low water temperture setting. you may have them crossed.
check all of your wiring.

Posted on Jan 13, 2009


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